1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jarptica [38.1K]
3 years ago
14

How many elements are there

Chemistry
1 answer:
yawa3891 [41]3 years ago
4 0
There are 118 known elements
You might be interested in
How are the noble gases stable and do they exist separatly with no other element
Marrrta [24]
Yes they are stable because they follow octet rule but am not sure if they are exist separetly
7 0
3 years ago
Espresso Coffee House is designing a coffee mug that keeps liquids hot. The research department tested several different materia
raketka [301]

Answer:

This question is incomplete

Explanation:

This question is incomplete because the result of the described experiment would have better determined the type of scientific explanation to profer. However, the type of material that will preserve the relative hotness or temperature of the hot coffee for the longest time will be a material than can resist heat transfer. These materials tend to keep hot substances hot by not allowing the heat of the coffee to be conducted or pass through it. These materials are mostly insulators or made by placing an insulator between two heat conductors.

Generally, heat is usually transferred from a region of higher concentration to a region of lower concentration, hence when the heat is denied of this transfer, the heat will remain trapped in the "heat-donor" substance (in this case the hot coffee). Thus, the material chosen (A, B or C) will be the material that resists heat transfer the most based on the explanation above.

4 0
3 years ago
Why are coal, oil, and natural gas called fossil fuels?
sergeinik [125]

Because that's where they come from.  Coal, oil, and natural gas are the products
of dead dinosaurs rotting in the ground under great pressure for millions of years. 


6 0
3 years ago
Read 2 more answers
Which of the following correctly describes a reaction that forms a disaccharide from two monosaccharides?
Dafna11 [192]
The answer that correctly describes a reaction that forms a disaccharide from two monosaccharides is Galactose + glucose = lactose. 
Cellulose is not a disaccharide, glycogen is not a monosaccharide, and sucrose isn't either. 
5 0
2 years ago
Given w = 0, an endothermic reaction has the following.
tamaranim1 [39]

D) + ΔH and +ΔE

Given this is one of the answer choices

8 0
3 years ago
Other questions:
  • A balloon filled with air has a volume of 4.24 liters at 23.00°
    6·2 answers
  • The ΔHvap of a certain compound is 49.09 kJ·mol–1 and its ΔSvap is 53.69 J·mol–1·K–1. What is the boiling point of this compound
    14·1 answer
  • What is the rate of a reaction if the value of kis 0.1, [A] is 1 M, and [B] is 2 M?
    8·1 answer
  • A certain substance X has a normal boiling point of 117.8°C and a molal boiling point elevation constant =Kb·0.63°C·kgmol−1. A s
    12·1 answer
  • A measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.
    13·1 answer
  • A mole of hydrogen atoms has 6.02 x 10^23 atoms. It occupies 22.414 L. How many hydrogen atoms are in 50.00 mL?
    7·1 answer
  • The molarity of a solution is 2.1m. How many mole of solute is in a 7.4 liter solution
    10·1 answer
  • Написати 4 пункта +до кожного приклад
    8·1 answer
  • How many moles of calcium atoms are in each mole of calcium carbonate?
    7·2 answers
  • SEP Analyze Data Look at the phase diagram. What is the state of matter for methanol at a temperature of −0.1°C and a pressure o
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!